Casio Launches First Smart Ring With a Built-in Screen

Casio's CRW-H001M-8 smart ring, launching first in China at roughly $294, is the only one that includes a small built-in screen alongside full health tracking — heart rate, blood oxygen, sleep, body temperature, steps, and calories. Rivals like Oura have no screen at all. Battery life of four to six days suggests the display uses real power. Casio has not yet described the phone app.